Actress Rebecca Hall says she has come to "regret" working with Woody Allen and has vowed not to collaborate with the controversial director again in light of his sexual abuse allegations.

Hall, who starred as Vicky in Allen's 2008 film Vicky Cristina Barcelona, posted an emotional Instagram message Friday discussing her "conflicted" thought-process before coming to terms with having worked with Allen.

"I regret this decision and wouldn’t make the same one today," Hall wrote, adding she will donate her wages from a small role on Allen's latest film to the sexual harassment advocacy group, Time's Up.

Woody Allen, second from right, writer/director of 'Vicky Cristina Barcelona,' poses with cast members, from left, Penelope Cruz, Scarlett Johansson and Rebecca Hall at the premiere of the film in Los Angeles in 2008.(Photo: AP)

"It’s a small gesture and not one intended as close to compensation but I’ve donated my wage to @timesup," Hall wrote in the post.

Dylan Farrow, the adopted daughter of actress Mia Farrow and then-partner Allen, has maintained that Allen molested her in a 1992 incident, writing the claims in an open letter published by the New York Times website in 2014.

Allen has repeatedly denied Farrow's continued allegations.

Hall said she remains "conflicted and saddened" about her decision to work with the director. Allen, she says, gave her "one of my first significant roles in film for which I have always been grateful."

But after reading thoroughly on the case and Dylan Farrow's statements, Hall wrote, "I see, not only how complicated this matter is, but that my actions have made another woman feel silenced and dismissed."

"That is not something that sits easily with me in the current or indeed any moment, and I am profoundly sorry," Hall added.